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Title: Non-Fickian diffusion and the accumulation of methane bubbles in deep-water sediments
Authors: Goldobin, Dennis S.
Brilliantov, N. V.
Levesley, J.
Lovell, M. A.
Rochelle, C. A.
Jackson, P. D.
Haywood, A. M.
Hunter, S. J.
Rees, J. G.
First Published: 30-May-2014
Publisher: Springer Berlin Heidelberg
Citation: The European Physical Journal E Soft Matter, 2014, 37 (5), p. 45
Abstract: In the absence of fractures, methane bubbles in deep-water sediments can be immovably trapped within a porous matrix by surface tension. The dominant mechanism of transfer of gas mass therefore becomes the diffusion of gas molecules through porewater. The accurate description of this process requires non-Fickian diffusion to be accounted for, including both thermal diffusion and gravitational action. We evaluate the diffusive flux of aqueous methane considering non-Fickian diffusion and predict the existence of extensive bubble mass accumulation zones within deep-water sediments. The limitation on the hydrate deposit capacity is revealed; too weak deposits cannot reach the base of the hydrate stability zone and form any bubbly horizon.
DOI Link: 10.1140/epje/i2014-14045-x
eISSN: 1292-895X
Version: Post-print
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2014, EDP Sciences. This is an author produced manuscript of a paper published in The European Physical Journal E Soft Matter, 2014, 37 (5), p. 45. The final publication is available at Springer via
Appears in Collections:Published Articles, Dept. of Mathematics

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